Here's a short vid a customer just sent me. Keihin CR smoothbore carbs with Joe Hunt magneto. This is my favorite setup. I used to sell these and I wish I had the time to keep offering them but my workload is heavy right now and they require a lot of modifications and fabricated parts to fit a Norton. \ The CR carbs have a choke and are very precise. The only modification the Magneto needs is to replace the soft hex shaft with a piece of grade 8 hard Allen wrench hex shaft. This setup provides the easiest starting - the magneto spark is the hottest.